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Design references for MEP engineers, HVAC designers and consultants: how much airflow a space needs, how to size ducts and fans, how static pressure changes the duty point, and how to select and verify a system. Each guide states the method, the assumptions and the source behind it so you can check the numbers yourself.

The four house ventilation systems — exhaust, supply, balanced, and HRV/ERV — compared on cost, heat recovery, filtration, and climate fit, plus how to choose.

The four residential ventilation layouts, how to size a fresh air system with ASHRAE 62.2, where to install it, and checklists for new-house and retrofit projects.

Why ventilation matters, the four basic layouts — exhaust, supply, balanced, and heat recovery — what air changes per hour mean, and how to design a system.